The B.5 was the first aircraft designed and built in the Czech Republic after the creation of that nation at the end of the war. The B.5 was designed and constructed at the Bohemia Pilsen works. It had one engine and two seats in separate, tandem open cockpits. The B.5 is a typical biplane sport/trainer aircraft of the period. Its upper wing is staggered forward of the lower wing. The lower wing attaches to the lower fuselage between the two cockpits; the upper wing is a one-piece unit over the fuselage. Only the upper wing has ailerons. The wings are connected with struts. The fixed undercarriage used an axle between the two wheels, and a tailskid. The empennage was conventional, with the tailplane affixed to the top of the tailcone. The engine was a NAG four-cylinder inline piston engine, rated at 40 hp. It turned a two-blade wooden propeller. Rotation was counterclockwise as viewed from the cockpit.